package com.DHH.WebSocket;

import java.io.IOException;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.WebSocketMessage;
import org.springframework.web.socket.WebSocketSession;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

/**
 * Socket处理器
 *
 * @author Goofy
 * @Date 2015年6月11日 下午1:19:50
 */
@Component
public class MyWebSocketHandler implements WebSocketHandler {
    public static final Map<Long, WebSocketSession> userSocketSessionMap;

    static {
        userSocketSessionMap = new HashMap<Long, WebSocketSession>();
    }

    /**
     * 建立连接后
     */
    public void afterConnectionEstablished(WebSocketSession session)
            throws Exception {
        Long uid = (Long) session.getAttributes().get("uid");
        if (userSocketSessionMap.get(uid) == null) {
            userSocketSessionMap.put(uid, session);
        }
    }

    /**
     * 消息处理，在客户端通过Websocket API发送的消息会经过这里，然后进行相应的处理
     */
    public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception {
        if(message.getPayloadLength()==0)return;
        SocketMessage msg=new Gson().fromJson(message.getPayload().toString(),SocketMessage.class);
        msg.setDate(new Date());

        String action=msg.getAction();
        String did=msg.getDid();
       // session.sendMessage(new TextMessage(new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create().toJson(msg)));
       // sendMessageToUser(msg.getTo(), new TextMessage(new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create().toJson(msg)));
    }


    public void open(){

    };

    public void close(){

    };

    /**
     * 消息传输错误处理
     */
    public void handleTransportError(WebSocketSession session,
                                     Throwable exception) throws Exception {
        if (session.isOpen()) {
            session.close();
        }
        Iterator<Entry<Long, WebSocketSession>> it = userSocketSessionMap
                .entrySet().iterator();
        // 移除Socket会话
        while (it.hasNext()) {
            Entry<Long, WebSocketSession> entry = it.next();
            if (entry.getValue().getId().equals(session.getId())) {
                userSocketSessionMap.remove(entry.getKey());
                System.out.println("Socket会话已经移除:用户ID" + entry.getKey());
                break;
            }
        }
    }

    /**
     * 关闭连接后
     */
    public void afterConnectionClosed(WebSocketSession session,
                                      CloseStatus closeStatus) throws Exception {
        System.out.println("Websocket:" + session.getId() + "已经关闭");
        Iterator<Entry<Long, WebSocketSession>> it = userSocketSessionMap
                .entrySet().iterator();
        // 移除Socket会话
        while (it.hasNext()) {
            Entry<Long, WebSocketSession> entry = it.next();
            if (entry.getValue().getId().equals(session.getId())) {
                userSocketSessionMap.remove(entry.getKey());
                System.out.println("Socket会话已经移除:用户ID" + entry.getKey());
                break;
            }
        }
    }

    public boolean supportsPartialMessages() {
        return false;
    }

    /**
     * 给所有在线用户发送消息
     *
     * @param message
     * @throws IOException
     */
    public void broadcast(final TextMessage message) throws IOException {
        Iterator<Entry<Long, WebSocketSession>> it = userSocketSessionMap
                .entrySet().iterator();

        // 多线程群发
        while (it.hasNext()) {

            final Entry<Long, WebSocketSession> entry = it.next();

            if (entry.getValue().isOpen()) {
                // entry.getValue().sendMessage(message);
                new Thread(new Runnable() {

                    public void run() {
                        try {
                            if (entry.getValue().isOpen()) {
                                entry.getValue().sendMessage(message);
                            }
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }

                }).start();
            }

        }
    }

    /**
     * 给某个用户发送消息
     *
     * @param uid
     * @param message
     * @throws IOException
     */
    public void sendMessageToUser(Long uid, TextMessage message)
            throws IOException {
        WebSocketSession session = userSocketSessionMap.get(uid);
        if (session != null && session.isOpen()) {
            session.sendMessage(message);
        }
    }

}